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Proceedings Paper

Fabrication of nano-walls for solar cell application
Author(s): Yukimi Ichikawa; Hiroshi Tomizawa; Shuhei Yoshiba; Masakazu Hirai; Makoto Konagai
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Paper Abstract

A crystalline Si based tandem solar cell composed of a nano-wall top cell and a conventional p/n junction bottom cell has been studied. To increase the bandgap of top cell by the quantum confinement effect, the width of nano-walls should decreased to 2 nm or narrower. In this work, we studied how to make nano-walls with a width of several nm by adopting top-down processes. As a result, an array of nano-walls with a width of about 2.0 nm was obtained. The fabrication process of nano-walls is described in detail. In addition, we measured the reflectance of the fabricated samples, and found that the reflectance in the range of 400 nm to 1000 nm was lower than 4%.

Paper Details

Date Published: 7 October 2014
PDF: 6 pages
Proc. SPIE 9178, Next Generation Technologies for Solar Energy Conversion V, 91780O (7 October 2014); doi: 10.1117/12.2061494
Show Author Affiliations
Yukimi Ichikawa, Japan Science and Technology Agency (Japan)
Hiroshi Tomizawa, Japan Science and Technology Agency (Japan)
Shuhei Yoshiba, Japan Science and Technology Agency (Japan)
Masakazu Hirai, Japan Science and Technology Agency (Japan)
Makoto Konagai, Japan Science and Technology Agency (Japan)
Tokyo Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 9178:
Next Generation Technologies for Solar Energy Conversion V
Oleg V. Sulima; Gavin Conibeer, Editor(s)

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